Steam-stamp



(No Model.) 2 Sheets-Sheet 1.

' C. W. TRBMAIN.

STEAM STAMP.

Patented Aug. 2, 1892.

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(No Model.) 2 Sheets--Sheet 2. C. W. TREMAIN.

STEAM STAMP.

Patented Aug. 2, 1892..

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NITED STATES PATENT OFFICE.

CHARLES IV. TREMAIN, OF PORTLAND, OREGON.

' STEAM-STAM P.

SPECIFICATION forming part of Letters Patent No. 480,223, dated August 2, 1892. Application filed January 23, 1892. Serial No. 419,062. (No model.)

To all whom it may concern,.-

Beit known that I, CHARLES W. TREMAIN, a citizen of the United States, residing at Portland, in the county of Multnomah and State of Oregon, have invented certain new and useful Improvements in Steam-St-am ps, ot' of which the following is a specification, reference being had therein to the accom pan yin g drawings.

This improvement relates to that class of steamstamps in which two stamps are employed, each one of which is raised by the power of the steam as the other falls; and the invenion consists in the peculiar construction, arrangement, and combinations of parts, hereinafter more particularly described and then definitely claimed.

In the accompanying drawings, Figure l is a vertical nearly-central section of a stamp constructed according to my improvement. Fig. 2 is a central section taken on the linea: fr, Fig. l. Fig. 3 is a central vertical section of the top of the cylinders and the pistonvalve on the same line as in Fig. l, but on a larger scale. Fig. 4 is a plan of the valvechest with the lever broken away. Fig. 5 is a plan of the cylinders with the cap-plate removed. Fig. 6 is a plan of the cap-plate covering both cylinders and showing the valvechest in horizontal section. Fig. 7 is a detail in section, showing part of the valve and two ofthe ports leading to the cylinder. Fig. 8 is a transverse section of the valve and its chest. Fig. 9 is a reversed plan of the valve detached. Fig. 10 is a side view of the mortar detached. Fig. ll is a plan of the battery with the other parts removed. Fig. l2 is a similar view to Fig. 4 with the valve in a dil'- ferent position.

Referring now to the details of construction by figures, l represents the battery of the stamp, from which rise four standards or rods 2, whose upper ends are threaded to receive nuts 3, between which are the pillowblocks 4, which form beaiings for the cylinders 6. In each of these cylinders is a piston 7, having a stem 8, which works through the 'stufing-box 9 and carries on its lower end a stamp 10, fastened thereto in any convenient manner. The central parts of these stems are made of a spiral polygonal form, as shown at 8 in Figs. 1 and 2, and work through correspondingly-shaped holes in the ratchetwheels ll, set in a cross-frame or housing 12, supported on the standards 2. Attached to the center of this housing'is a spring 13, whose opposite ends engage with the teeth of the ratchet-Wheels ll. In the central wall between the cylinders passages 2l are formed, leading from the top of cylinders, as shown in Fig. 5, down to the bottom thereof, as shown in Fig. l. At the rear of these are shorter passages 22, which communicate with the top of the cylinder, as shown in Figs. 3 and 7. In the outer wall of the cylinders are formed rather longer passages 23, both ends of which terminate in the cylinders, the upper ends being close to the top thereof, while the lower ends are so arranged as to terminate just below the piston when the latter is at its highest point, as shown in Fig. l. On the top of these cylinders is a cap-plate 24, which carries the valve-chest 25, having pipes for the inlet of steam 2G and the exhaust 27. From these pipes run corresponding passages 28 and 29 in opposite directions toward the different cylinders, and on the opposite sides of the center of the valve-chest are two sets of ports 30 and 3l, the former communicating with the passages 2l and vthe latter with the passages At 32 is shown )assages substantially over Y knob or handle 36, by which the valve may be set in position by hand when starting the stamp. On the under side of the valve are ports 37 and 3S and on the sides are other ports 39, 40, Land i2. Each end has an annular groove 43, and the ends are perforated with holes 4i, connecting with these annular grooves. At the topis a groove 45, into which a screw t6 passes to keep the valve from turning in its seat. Each head of the valvechest has a socket et? to receive a cushion of rubber -LLS to act as a bumper to prevent damage.

The battery consists ol' a mortar 5l,l1aving square recesses 52 in its bot-tom to receive the dies 53, which are octagonal at bottom, four of the sides of which iit in between the walls ot the recesses 52, leaving a space in the cor-' IOO ners of the recesses to admit tools to pry out the dies when worn out, so as to replace them with others. Attached to the mortar are the end platesy 54, each being furnished with a screen 55, and are secured by bolts 56, passing in front and in rear of the inortar and fastened by nuts 57. Near each edge of the end plates are grooves 58, in which are set the hopper 59 and screen 60,botli of which are seciiied by keys 61 and are so made as to be interchangeable, in order to place the hopper in the most convenient side for operation. Near the bottom of the end plates are grooves 62, which receive projecting ribs 63 on the ends ofthe mortar, so as to form a firm connection therewith, and thus enable the bolts 56 to securely hold the whole together.

The stamps are made octagonal at top, so that when worn away to about half their depth they can be taken 0E and reversed, when they can be set in the die-sockets and used in place ot worn-out dies, thus utilizing the old worn-out stamps and saving the cost of new dies.

The operation is as follows: Supposing the valve is in the position shown in Figs. 3 and 4, steam enters at 2G (see Fig. 4) and passes to the right in the passage 28, enters the port 42, and passes down to the right-hand cylinder through the right-hand passage 2l and raises the ,piston until it reaches the position shown in Fig. 3, when it has closed the port 22, but allows communication between the space in the cylinder on the opposite sides of the piston through the passage 23, so that live steam passesfrom below the piston tothespace above the top thereof, and, passing through the port 32 into the annular groove 43 and the holes 44, acts upon and moves the valve to the opposite position, as shown in Fig. 12, when the port 38 opens communication between the ports 21 and 22 and the steam from the bottom of the cylinder enters the top of the cylinder, and, acting expansively, forces the piston downward, as the top surface of the piston has much more area than the bottom. While the right-hand piston is being driven down the other piston is being raised by steam entering through the left-hand end of the inlet-passage 28 and passing through the port 41 into the valve 33, down through the left-hand passage 21 to the bottom of the left-hand cylinder, thus raising the piston on that side. The exhaust of the steam above the piston is then going on through the left-hand passage 22 out through the left-hand end of the exhaust-passage 29. As soon as theleft-hand cylinder rises past the passage 22 the exhaust is shut 0E and the steam enters the left-hand passage 32, and, passing into the annular groove 43 and through the holes 4 4, acts on the end of the valve and drives it to the opposite position, as shown in Fig. 4, when the entire operation is repeated as before.

seen that in place of using two valves, as heretofore practiced with this class of stamp, I

From this it will be only use one valve for both cylinders, thus economizing in first cost, making the parts lighter, reducing them in number, lessening the friction, and economizing in repairs, besides making the entire apparatus more convenient and less likely to get out of repair.

Some of the features shown herein relating to the construction of the mortar and stamp are partially shown in my application,Serial No. 396,861, and my patent, No.469,187, dated February16,1892, andarenothereclaimed,but are shown and claimed in a separate application to be hereafter filed as a division of this.

1. The combination, with two cylinders and their pistons, of a single valve controlling the inlet and exhaust steam of both cylinders and the steam from one cylinder moving the valve to admit steam to the other cylinder, substantially as described.

2. The combination, with two cylinders and their pistons, of a single valve operated by the direct pressure of the steam controlling the inlet and exhaust steam of both cylinders and the steam from one cylinder moving the valve to admit steam to the other, substantially as described.

3. The combination, with two cylinders and their pistons, of a single-piston valve having the ends of its chest communicating with both cylinders and operated by the direct action of the steam on its ends and controlling the inlet and exhaust steam of bot-h cylinders, substantially as described.

4. The combination, with two cylinders and their pistons, of a cap-plate covering both cylinders and carrying a valve-chest and a valve governing the inlet and exhaust of both cyl` inders and said cap having passages 32 to admit steam to the ends of the chest to operate the valve, substantially as described.

5. The combination, with apiston and valve, of a cylinder in which the piston works, having a passage 23, terminating at the top of the cylinder, and a passage 32 in the cap to permit steam from the cylinder to operate the valve, substantially as described.

6. The combination, with two cylinders having passages 21 and 22 and pistons working in said cylinders, of a reciprocating valve having ports 37, 38, 39, 40, 4l, and 42, communicating with said passages 2l and 22, and a valve-chest in which said valve reciprocates, having suitable inlet and exhaust passages, substantially as described.

7. The combination,with two cylinders having passages 21, 22, and 23 and pistons working in said cylinders, of a valve having ports 37, 38, 39, 40,41, and 42, communicating with said passages 21 and 22, and a valve-chest in which said valve works and communicating at its opposite ends with the passages 23 to admit steam to operate said valve, substantially as described.

8. The combination, with two cylinders having passages 21, 22, and 23 and pistons work- IOO ing in said cylinders, of a valve having the In testimony whereof Iafx my signature, in annular groove 43, holes 44, and the ports 37, presence of two Witnesses, this 23d day of Jan- 1o 38, 39, 40, 41, and 42, communicating with said uary, 1892. passages 2l and 22, a cap-plate covering said cylinder having openings 32, and a Valve-chest on said cap-plate communicating with the WVitnesses: passages 2l and 22, and suitable inlet and ex- S. BRAsHEARs,

haust passages, substantially as described. THOS. E. ROBERTSON.

CHARLES XV. TREMAIN. 

